Well if you want to try yourself:
here a demo version of the program you need (there is other kind of soft doing the same task but I am using this one)
Spectrogram 11 (
http://www.visualizationsoftware.com/gram.html ) 10 days demo.
in gram11 choose as input sound source in File menu (F7): "what you ear" then in the same file menu "F1" and select what kind of display you want (see the help).
lauche DW in windowed mode and enjoy.
if you have problems, check for a virtual audio cable software like VAC (
http://www.ntonyx.com/vac.htm ) install and slect your audio card as input and virtual cable audio as output and in gram11 select virtual cable 1 output.
this an example of active ping retunr with the seawolf, sorry for the image size:
I try a misison with an FFG in active ping an Akula at 2mn but I can't ear the Perry sonar in the akula
(Murphy laws??) so you have all elements to try yourself.
I will try in MP game with an MS member this days (sub vs SH-60 sonbuoy and active sonar and torpedo, I hope I will ear the pings).